Automatic correlation accelerator

ABSTRACT

Automatic correlation, in which an automatic correlation accelerator tool accesses at least a first and a second recording of a base script that defines operations executed in testing performance of a system. The tool causes the system to execute the first recording of the base script and the second recording of the base script and stores, in electronic storage, dynamic value data that describes dynamic values generated during execution of the first recording of the base script and during execution of the second recording of the base script. The tool automatically, without human intervention, analyzes the stored dynamic value data to identify candidates for correlation within the base script and generates a correlated script based on the identified candidates for correlation and the base script.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation (and claims the benefit of priorityunder 35 USC 120) of U.S. patent application Ser. No. 14/339,814, filedJul. 24, 2014, which is a continuation of U.S. patent application Ser.No. 13/275,447, filed Oct. 18, 2011, now U.S. Pat. No. 8,825,447, issuedSep. 2, 2014, which claims the benefit of Indian Patent Application No.258/CHE/2011, filed on Jan. 28, 2011. All of these applications areincorporated herein by reference in their entirety for all purposes.

FIELD

This disclosure relates to automatic correlation technology.

BACKGROUND

Automated processes may be used to performance test a system. Theautomated processes may simulate actions performed on the system by manyusers to test whether the system can handle anticipated load anddetermine statistics on the quality of use provided by the system undervarious test conditions. The automated processes may reference variousscripts of user actions to test a variety of circumstances the systemmay encounter during operation.

SUMMARY

In one aspect, an automatic correlation accelerator tool includes atleast one processor and at least one memory coupled to the at least oneprocessor having stored thereon instructions which, when executed by theat least one processor, causes the at least one processor to performoperations. The operations include accessing, from electronic storage,at least a first recording of a base script and a second recording ofthe base script. The base script defines operations executed in testingperformance of a system. The operations also include causing the systemto execute the accessed first recording of the base script and theaccessed second recording of the base script and storing, in electronicstorage, dynamic value data that describes dynamic values generatedduring execution of the accessed first recording of the base script andduring execution of the accessed second recording of the base script.The operations further include automatically, without humanintervention, analyzing the stored dynamic value data to identifycandidates for correlation within the base script, generating acorrelated script based on the identified candidates for correlation andthe base script, and storing, in electronic storage, the correlatedscript.

Implementations may include one or more of the following features. Forexample, the operations may include automatically, without humanintervention, performing parameterization of the correlated script. Theoperations also may include generating a correlated and parameterizedscript based on the parameterization of the correlated script. Theoperations further may include automatically, without humanintervention, causing the system to execute the correlated andparameterized script. The execution of the correlated and parameterizedscript may result in testing performance of the system. In addition, theoperations may include generating performance testing output for thesystem based on the execution of the correlated and parameterizedscript.

In some implementations, the operations may include generating andstoring a dynamic value list that includes dynamic values generatedduring execution of the accessed first recording of the base script andduring execution of the accessed second recording of the base script. Inthese implementations, the operations may include automatically, withouthuman intervention, generating a correlation log using the dynamic valuelist and the accessed first recording of the base script. Further, inthese implementations, the operations may include generating acorrelated script using the correlation log and the accessed firstrecording of the base script.

In some examples, the operations may include automatically, withouthuman intervention, generating a parameterization log using the dynamicvalue list and the accessed first recording of the base script. In theseexamples, the operations may include automatically, without humanintervention, performing parameterization analysis using theparameterization log, the correlated script, and the accessed firstrecording of the base script. In addition, in these examples, theoperations may include generating a correlated and parameterized scriptbased on the parameterization analysis and generating a correlated andparameterized script that is ready for execution by a performancetesting controller.

In some implementations, the operations may include comparing theaccessed first recording of the base script with the accessed secondrecording of the base script to validate the first and second recordingsof the base script. In these implementations, the operations may includegenerating and storing a validation log that describes results of thevalidation of the first and second recordings of the base script andfiltering lines of the first and second recordings of the base scriptusing the validation log, the accessed first recording of the basescript, and the accessed second recording of the base script.

In some examples, the operations may include generating, based onfiltering lines of the first and second recordings of the base script, afirst temporary recording of the base script and a second temporaryrecording of the base script. In these examples, the operations mayinclude generating correlation logs using the first temporary recordingof the base script and the second temporary recording of the basescript. In addition, in these examples, the operations may includegenerating a final recording of the base script that is usable forperformance testing by performing script generation and outputformatting using the correlation logs and the first temporary recordingof the base script.

In another aspect, a method includes accessing, by an automaticcorrelation accelerator tool and from electronic storage, at least afirst recording of a base script and a second recording of the basescript. The base script defines operations executed in testingperformance of a system. The method also includes causing, by theautomatic correlation accelerator tool, the system to execute theaccessed first recording of the base script and the accessed secondrecording of the base script and storing, in electronic storage, dynamicvalue data that describes dynamic values generated during execution ofthe accessed first recording of the base script and during execution ofthe accessed second recording of the base script. The method furtherincludes automatically, by the automatic correlation accelerator tooland without human intervention, analyzing the stored dynamic value datato identify candidates for correlation within the base script,generating, by the automatic correlation accelerator tool, a correlatedscript based on the identified candidates for correlation and the basescript, and storing, in electronic storage, the correlated script.

In yet another aspect, at least one computer-readable storage medium isencoded with executable instructions that, when executed by at least oneprocessor, cause the at least one processor to perform operations. Theoperations include accessing, from electronic storage, at least a firstrecording of a base script and a second recording of the base script.The base script defines operations executed in testing performance of asystem. The operations also include causing the system to execute theaccessed first recording of the base script and the accessed secondrecording of the base script and storing, in electronic storage, dynamicvalue data that describes dynamic values generated during execution ofthe accessed first recording of the base script and during execution ofthe accessed second recording of the base script. The operations furtherinclude automatically, without human intervention, analyzing the storeddynamic value data to identify candidates for correlation within thebase script, generating a correlated script based on the identifiedcandidates for correlation and the base script, and storing, inelectronic storage, the correlated script.

The details of one or more implementations are set forth in theaccompanying drawings and the description, below. Other potentialfeatures and advantages of the disclosure will be apparent from thedescription and drawings, and from the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1, 2, and 9 are diagrams of exemplary systems.

FIGS. 3, 5, and 8 are flowcharts of exemplary processes.

FIG. 4 is a diagram illustrating an exemplary user interface.

FIG. 6 is a diagram illustrating an exemplary correlation log.

FIG. 7 is a diagram illustrating an exemplary parameterization log.

Like reference numbers represent corresponding parts throughout.

DETAILED DESCRIPTION

In some implementations, an automatic correlation accelerator toolreduces the correlation scripting effort for performance, stress, andload testing scripts. In these implementations, the automaticcorrelation accelerator tool parses through response files of a recordedscript, compares it with an identical recording of another script forthe same business flow to identify the correlation parameters, andcreates a new script with the identified correlation parameters. The newscript with the identified correlation parameters may be used forperformance, stress, and load testing.

FIG. 1 illustrates an exemplary system 100 for generating a correlatedscript. An automatic correlation and parameterization system 102 takesas input a first script recording 104 and a second script recording 106.The first and second script recordings 104 and 106 may have beengenerated, for example, using a script generator 108 or may have beencoded manually by a developer. The first and second script recordings104 and 106 may be accessed from electronic storage and each may be arecording of a base script which is used to test performance of asystem. The first and second script recordings 104 and 106 describe actsthat a virtual user may perform during a test scenario. For example, thefirst and second script recordings 104 and 106 may include instructionswhich simulate a virtual user performing actions which result in variousinteractions with one or more servers.

With some server interactions, a server may return to a client one ormore dynamic values which are unique for each interaction with theserver. For example, a dynamic value may be a unique identifier, and/ormay be a value which is based on the current date and time. The serversends the dynamic value to the client so that the server can identify asubsequent response sent by the client. For a testing scenario using thebase script and virtual users, a correlation and/or parameterizationprocess may need to be performed so that the base script is able toidentify a dynamic value sent from a server and to use that dynamicvalue in subsequent responses sent to the server. If a correlationand/or parameterization process is not performed, executing the basescript may result in an error due to a server not recognizing a valuesent from a client.

Manually identifying dynamic values can be a lengthy and error-proneprocess which can require specific knowledge of both a testing tool andof a specific server system. To reduce an amount of manual effort neededto perform correlation and parameterization, the automatic correlationand parameterization system 102 may be used. The automatic correlationand parameterization system 102 is configured to automatically identifydynamic values and to generate a correlated and parameterized script 109which can be executed by a performance testing controller 110 to testperformance of the system to be tested.

In further detail, the automatic correlation and parameterization system102 includes a correlation component 112 which initiates execution ofthe first script recording 104 and the second script recording 106 andstores, in electronic storage, dynamic value data that describes dynamicvalues generated during execution of the first script recording 104 andthe second script recording 106. The correlation component 112automatically, without human intervention, analyzes the stored dynamicvalue data to identify candidates for correlation within the basescript. For example, the correlation component 112 may compare dynamicvalue data generated during execution of the first script recording 104to dynamic value data generated during execution of the second scriptrecording 106.

The correlation component 112 generates the correlated script 109 basedon the identified candidates for correlation and the base script and maystore the correlated script 109 in electronic storage. In someimplementations, the automatic correlation system 102 automatically,without human intervention, initiates the execution of the correlatedscript 109 by the performance testing controller 110 to test performanceof the system to be tested.

The automatic correlation and parameterization system 102 also includesa parameterization component 114. The parameterization component 114 maybe used to create a script that is parameterized as well as correlated.A script parameter is a value that may change for every scriptexecution. Rather than a value corresponding to a server-generateddynamic value, however, a parameter value may be supplied by a user, ormay be read from electronic storage accessible from the performancetesting controller 110. The parameterization component 114 may analyzethe stored dynamic value data, may automatically identify parametersbased on the analyzed dynamic value data, and may generate a correlatedand parameterized script which includes the identified parameters.

Although the example shown in FIG. 1 shows the automatic correlation andparameterization system 102 as performing parameterization aftercorrelation, other examples may be used. For instance, the automaticcorrelation and parameterization system 102 may perform parameterizationprior to correlation in generating the correlated script 109.

In addition, although the example shown in FIG. 1 shows the automaticcorrelation and parameterization system 102 as performing bothcorrelation and parameterization, other examples may be used.Specifically, correlation and parameterization are independent processesthat may be performed by the same system or may be performed bydifferent systems (e.g., an automatic correlation system that performscorrelation and an automatic parameterization system that performsparameterization).

Also, as indicated above, correlation and parameterization may beperformed in different orders and at different times based onconfiguration of the system. Accordingly, in some implementations, anautomatic correlation system may perform correlation prior to anautomatic parameterization system performing parameterization ingenerating the correlated script 109. In other implementations, anautomatic parameterization system may perform parameterization prior toan automatic correlation system performing correlation in generating thecorrelated script 109. In further implementations, only correlation maybe performed or only parameterization may be performed to facilitategeneration of a script that is ready for performance testing.

FIG. 2 illustrates an exemplary automatic correlation system 200 forgenerating a correlated script. The system 200 includes an input module210, a data store 220, one or more processors 230, one or more I/O(Input/Output) devices 240, and memory 250. The input module 220 may beused to input any type of information related to generating a correlatedscript on the system 200. For example, the input module 210 may be usedto receive a selection of a first recording of a base script and asecond recording of the base script, where the base script definesoperations executed in testing performance of a system. In someimplementations, data from the input module 210 is stored in the datastore 220. The data included in the data store 220 may include, forexample, base scripts, correlation logs, parameterization logs, dynamicvalue data, generated correlation scripts, and multiple recordings ofthe base script, including temporary recordings.

In some examples, the data store 220 may be a relational database thatlogically organizes data into a series of database tables. Each databasetable in the data store 220 may arrange data in a series of columns(where each column represents an attribute of the data stored in thedatabase) and rows (where each row represents attribute values). In someimplementations, the data store 220 may be an object-oriented databasethat logically or physically organizes data into a series of objects.Each object may be associated with a series of attribute values. In someexamples, the data store 220 may be a type of database management systemthat is not necessarily a relational or object-oriented database. Forexample, a series of XML (Extensible Mark-up Language) files ordocuments may be used, where each XML file or document includesattributes and attribute values. Data included in the data store 220 maybe identified by a unique identifier such that data related to aparticular process may be retrieved from the data store 220.

The processor 230 may be a processor suitable for the execution of acomputer program such as a general or special purpose microprocessor,and any one or more processors of any kind of digital computer. In someimplementations, the system 200 includes more than one processor 230.The processor 230 may receive instructions and data from the memory 250.The memory 250 may store instructions and data corresponding to any orall of the components of the system 200. The memory 250 may includeread-only memory, random-access memory, or both.

The I/O devices 240 are configured to provide input to and output fromthe system 200. For example, the I/O devices 240 may include a mouse, akeyboard, a stylus, or any other device that allows the input of data.The I/O devices 240 may also include a display, a printer, or any otherdevice that outputs data.

FIG. 3 illustrates a process 300 for generating a correlated script. Theoperations of the process 300 are described generally as being performedby the system 200. In some implementations, operations of the process300 may be performed by one or more processors included in one or moreelectronic devices.

The system 200 accesses a first recording of a base script and a secondrecording of the base script (310). For example, the base script maydefine operations executed in testing performance of a system. The basescript may, for example, define actions of a virtual user which resultin one or more interactions with one or more server systems.

The system 200 causes execution of the first recording of the basescript and the second recording of the base script (320). For example,the first recording of the base script and the second recording of thebase script may be executed by a performance testing controller.

The system 200 stores dynamic value data that describes dynamic valuesgenerated during execution (330). For example, the system 200 may storedynamic value data generated during execution of the first recording ofthe base script and during execution of the second recording of the basescript. Dynamic value data may include, for example, dynamic valuesgenerated by a server. Dynamic value data may be stored, for example, inone or more dynamic value lists.

The system 200 analyzes the stored dynamic value data to identifycandidates for correlation within the base script (340). For example,the system 200 may compare dynamic value data generated during executionof the first recording of the base script to dynamic value datagenerated during execution of the second recording of the base script.The system 200 may automatically, without human intervention, generate acorrelation log using the dynamic value list and the accessed firstrecording of the base script. The correlation log may include, forexample, a list of candidates for correlation, and for each candidate,left boundary and right boundary delimiters which surround thecorrelation candidate in response data received from a server. Thecorrelation log may include other data associated with each candidatefor correlation.

The system 200 generates a correlated script based on the identifiedcandidates for correlation and the base script (350). For example, thesystem 200 may generate a correlated script by inserting, for eachcorrelation candidate, instructions into the base script at a locationcorresponding to the correlation candidate, to save a dynamic valuereceived from the server.

The system 200 stores the correlated script (360). For example, thecorrelated script may be stored in a data store (e.g., the data store220 described above with respect to FIG. 2). The modified base scriptmay be saved in electronic storage as the correlated script. A copy ofthe original base script may be generated and may be stored inelectronic storage.

FIG. 4 illustrates an exemplary user interface 400 for generating acorrelated script. A user may enter file identification information fora first script recording using a text control 402 or may browse for thefirst script recording using a browse control 404. Similarly, the usermay enter file identification information for a second script recordingusing a text control 406 or may browse for the second script recordingusing a browse control 408. The user may initiate generation of acorrelated script based on the first script recording and the secondscript recording by selecting a control 410. In some implementations,the user interface 400 includes a control 420 to configure whetherparameterization is performed as well as correlation to generate acorrelated and parameterized script.

FIG. 5 illustrates a flowchart of an exemplary process 500 forgenerating a correlated and parameterized script. In someimplementations, operations of the process 500 may be performed by oneor more processors included in one or more electronic devices. A firstscript recording 502 and a second script recording 504 are accessed,such as from electronic storage, and are used by a script validator subprocess 506 to generate a dynamic value list 508.

For example, the script validator sub process 506 may include theexecution of the first and second script recordings 502 and 504 and thecomparing of server responses received from execution of the firstscript recording 502 to server responses received from execution of thesecond script recording 504. The script validator sub process 506 mayinclude storing identified differences between server responses for thefirst script recording 502 and server responses for the second scriptrecording 504 in the dynamic value list 508.

A correlation identifier sub process 510 may use the dynamic value list508 to generate a parameterization log 512 and a correlation log 514.For example, FIG. 6 illustrates an example correlation log 600 and FIG.7 illustrates an example parameterization log 700. The examplecorrelation log 600 includes information for correlation candidates 602,604, 606, and 608. The correlation log 600 includes, for the correlationcandidate 602, an associated, identified dynamic data value 610, a leftboundary delimiter 612 and a right boundary delimiter 614. The leftboundary delimiter 612 and the right boundary delimiter 614 surround thedynamic data value 610 in response data received from a server. Thecorrelation log 600 may include other information for the correlationcandidate 602, such as an ordinal number 618 and an indication 620 of arequest snapshot associated with the correlation candidate. The ordinalnumber 618 may be used for data that is part of an array.

A left boundary delimiter may indicate the type of an associated dynamicdata value. For example, the left boundary delimiter 612 indicates thatthe dynamic data value 610 is an “ext-sid” identifier. A left boundarydelimiter 622 may indicate that a dynamic data value 624 associated withthe correlation candidate 604 is an “iviewhandle” value. A left boundarydelimiter 626 may indicate that a dynamic data value 628 associated withthe correlation candidate 606 is a timestamp value. A left boundarydelimiter 630 may indicate that a dynamic data value 632 associated withthe correlation candidate 608 is an identifier.

The example parameterization log 700 illustrated in FIG. 7 includesparameter entries 702 a-702 h. The example parameterization logincludes, for each parameter entry 702, a field of occurrence and aparameter value. For example, the parameter entry 702 a includes a fieldof occurrence 704 indicating an EVENTQUEUE field, and a parameter value706 of thirty two.

Returning to FIG. 5, a script generator sub process 516 may use thecorrelation log 514 to generate a correlated script 518 and aparameterization sub process 520 may use the parameterization log 512and the correlated script 518 to generate a correlated and parameterizedscript 522. In some implementations and for some script generations, thecorrelated and parameterized script 522 is automatically executed,without human intervention, resulting in performance testing of a systemto be tested. Based on execution of the correlated and parameterizedscript 522, performance testing output may be generated and may bestored in electronic storage.

FIG. 8 illustrates a flowchart of an exemplary process 800 forgenerating a correlated script. In some implementations, operations ofthe process 800 may be performed by one or more processors included inone or more electronic devices. A first script recording 802 and asecond script recording 804 are accessed, such as from electronicstorage, and are used by a script validation comparator sub process 806included in an automatic correlation accelerator system 808.

For example, the script validation comparator sub process 806 mayinclude the execution of the first and second script recordings 802 and804 and the comparing of server responses received from execution of thefirst script recording 802 to server responses received from executionof the second script recording 804. Validation and/or comparison resultsmay be generated and may be stored in one or more validation logs 810.

A line filter sub process 812 may use the validation logs 810 and thefirst script recording 802 and the second script recording 804 togenerate temporary scripts 814 (e.g., the temporary scripts 814 mayinclude a temporary version of the first script recording 802 and atemporary version of the second script recording 804). The line filtersub process 812 may, for example, filter lines from the first scriptrecording 802 and/or from the second script recording 804 to facilitatecorrelation and/or parameterization. For example, the first scriptrecording 802 and/or the second script recording 804 may includeextraneous lines which are not related to correlation orparameterization and which if not filtered would cause noise orotherwise distract from or complicate correlation or parameterizationprocessing. The temporary scripts 814 may include, for example, versionsof the first script recording 802 and the second script recording 814with lines filtered (e.g., lines removed).

A correlation identifier sub process 816 uses the temporary scripts 814and 816 to generate a correlation log 818. For example, the correlationlog 818 may be the correlation log 600 described above with respect toFIG. 6.

A script generator sub process 820 may use the correlation log 818 and atemporary version of the first script recording 802 to generate ausable, final script 822. In some implementations, the usable, finalscript 822 includes parameters identified during a parameterizationprocess. The usable, final script 822 may be executed in a scriptexecutor sub process 824. For example, the script executor sub process824 may include manual or automatic execution of the final, usablescript 822 in a performance testing controller to test performance of asystem.

FIG. 9 is a schematic diagram of an example of a generic computer system900. The system 900 can be used for the operations described inassociation with the processes 300, 500, and 800, according to oneimplementation. For example, the system 900 may be included in theautomatic correlation system 200.

The system 900 includes a processor 910, a memory 920, a storage device930, and an input/output device 940. Each of the components 910, 920,930, and 940 are interconnected using a system bus 950. The processor910 is capable of processing instructions for execution within thesystem 900. In one implementation, the processor 910 is asingle-threaded processor. In another implementation, the processor 910is a multi-threaded processor. The processor 910 is capable ofprocessing instructions stored in the memory 920 or on the storagedevice 930 to display graphical information for a user interface on theinput/output device 940.

The memory 920 stores information within the system 900. In oneimplementation, the memory 920 is a computer-readable medium. In oneimplementation, the memory 920 is a volatile memory unit. In anotherimplementation, the memory 920 is a non-volatile memory unit.

The storage device 930 is capable of providing mass storage for thesystem 900. In one implementation, the storage device 930 is acomputer-readable medium. In various different implementations, thestorage device 930 may be a floppy disk device, a hard disk device, anoptical disk device, or a tape device.

The input/output device 940 provides input/output operations for thesystem 900. In one implementation, the input/output device 940 includesa keyboard and/or pointing device. In another implementation, theinput/output device 940 includes a display unit for displaying graphicaluser interfaces.

The features described can be implemented in digital electroniccircuitry, or in computer hardware, firmware, software, or incombinations of them. The apparatus can be implemented in a computerprogram product tangibly embodied in an information carrier, e.g., in amachine-readable storage device, for execution by a programmableprocessor; and method steps can be performed by a programmable processorexecuting a program of instructions to perform functions of thedescribed implementations by operating on input data and generatingoutput. The described features can be implemented advantageously in oneor more computer programs that are executable on a programmable systemincluding at least one programmable processor coupled to receive dataand instructions from, and to transmit data and instructions to, a datastorage system, at least one input device, and at least one outputdevice. A computer program is a set of instructions that can be used,directly or indirectly, in a computer to perform a certain activity orbring about a certain result. A computer program can be written in anyform of programming language, including compiled or interpretedlanguages, and it can be deployed in any form, including as astand-alone program or as a module, component, subroutine, or other unitsuitable for use in a computing environment.

Suitable processors for the execution of a program of instructionsinclude, by way of example, both general and special purposemicroprocessors, and the sole processor or one of multiple processors ofany kind of computer. Generally, a processor will receive instructionsand data from a read-only memory or a random access memory or both. Theelements of a computer are a processor for executing instructions andone or more memories for storing instructions and data. Generally, acomputer will also include, or be operatively coupled to communicatewith, one or more mass storage devices for storing data files; suchdevices include magnetic disks, such as internal hard disks andremovable disks; magneto-optical disks; and optical disks. Storagedevices suitable for tangibly embodying computer program instructionsand data include all forms of non-volatile memory, including by way ofexample semiconductor memory devices, such as EPROM, EEPROM, and flashmemory devices; magnetic disks such as internal hard disks and removabledisks; magneto-optical disks; and CD-ROM and DVD-ROM disks. Theprocessor and the memory can be supplemented by, or incorporated in,ASICs (application-specific integrated circuits).

To provide for interaction with a user, the features can be implementedon a computer having a display device such as a CRT (cathode ray tube)or LCD (liquid crystal display) monitor for displaying information tothe user and a keyboard and a pointing device such as a mouse or atrackball by which the user can provide input to the computer.

The features can be implemented in a computer system that includes aback-end component, such as a data server, or that includes a middlewarecomponent, such as an application server or an Internet server, or thatincludes a front-end component, such as a client computer having agraphical user interface or an Internet browser, or any combination ofthem. The components of the system can be connected by any form ormedium of digital data communication such as a communication network.Examples of communication networks include, e.g., a LAN, a WAN, and thecomputers and networks forming the Internet.

The computer system can include clients and servers. A client and serverare generally remote from each other and typically interact through anetwork, such as the described one. The relationship of client andserver arises by virtue of computer programs running on the respectivecomputers and having a client-server relationship to each other.

A number of implementations have been described. Nevertheless, it willbe understood that various modifications may be made without departingfrom the spirit and scope of the disclosure. Accordingly, otherimplementations are within the scope of the following claims.

1. (canceled)
 2. A system comprising: one or more processors; and anon-transitory computer readable storage medium in data communicationwith the processors and storing instructions executable by theprocessors and upon such execution cause the processors to performoperations comprising: determining first dynamic value data thatdescribes one or more first dynamic values generated during a firstexecution of a first recording of a base script on a particular systemthat includes at least one processor and at least one memory and seconddynamic value data that describes one or more second dynamic valuesgenerated during a second execution of a second recording of the basescript on the particular system, the base script defining operations tobe executed in testing performance of the particular system; comparingthe first dynamic value data and the second dynamic value data toidentify candidate parameters for correlation within the base script;and inserting, for each of the identified candidate parameters and intoa copy of the base script at a location that corresponds to therespective identified candidate parameter, respective instructionsindicating that a dynamic value is to be saved during subsequentperformance testing of the particular system using the copy of the basescript.
 3. The system of claim 2, wherein inserting, for each of theidentified candidate parameters and into the copy of the base script ata location that corresponds to the respective identified candidateparameter, the respective instructions indicating that a dynamic valueis to be saved during subsequent performance testing of the particularsystem using the copy of the base script comprises inserting, for eachof the identified candidate parameters and into the base script at alocation that corresponds to the respective identified candidateparameter, the respective instructions indicating that a dynamic valueis to be saved during subsequent performance testing of the particularsystem using the base script.
 4. The system of claim 2, whereindetermining the first dynamic value data that describes the one or morefirst dynamic values generated during the first execution of the firstrecording of the base script on the particular system and the seconddynamic value data that describes the one or more second dynamic valuesgenerated during the second execution of the second recording of thebase script on the particular system comprises determining the firstdynamic value data that describes the one or more first dynamic valuesstored in a first response file generated during the first execution ofthe first recording of the base script on the particular system and thesecond dynamic value data that describes the one or more second dynamicvalues stored in a second response file generated during the secondexecution of the second recording of the base script on the particularsystem.
 5. The system of claim 4, the operations comprising: generatinga first temporary file by filtering one or more first lines from thefirst response file; and generating a second temporary file by filteringone or more second lines from the second response file.
 6. The system ofclaim 5, wherein determining the first dynamic value data that describesthe one or more first dynamic values stored in the first response fileand the second dynamic value data that describes the one or more seconddynamic values stored in the second response file comprises: analyzingthe first temporary file and the second temporary file to determine thefirst dynamic data and the second dynamic value data.
 7. The system ofclaim 2, wherein: determining the first dynamic value data thatdescribes the one or more first dynamic values generated during thefirst execution of the first recording of the base script on theparticular system and the second dynamic value data that describes theone or more second dynamic values generated during the second executionof the second recording of the base script on the particular systemcomprises: determining the first dynamic value data that describes theone or more first dynamic values received by the particular system froma first server during the first execution of the first recording of thebase script on the particular system; and determining the second dynamicvalue data that describes the one or more second dynamic values receivedby the particular system from a second server during the secondexecution of the second recording of the base script on the particularsystem; and comparing the first dynamic value data and the seconddynamic value data to identify the candidate parameters for correlationwithin the base script comprises comparing the first dynamic value datathat describes the one or more first dynamic values received by theparticular system from the first server and the second dynamic valuedata that describes the one or more second dynamic values received bythe particular system from the second server to identify the candidateparameters for correlation within the base script.
 8. The system ofclaim 7, wherein: determining the first dynamic value data thatdescribes the one or more first dynamic values received by theparticular system from the first server during the first execution ofthe first recording of the base script on the particular systemcomprises determining the first dynamic value data that describes theone or more first dynamic values received by the particular system froma particular server during the first execution of the first recording ofthe base script on the particular system; and determining the seconddynamic value data that describes the one or more second dynamic valuesreceived by the particular system from the second server during thesecond execution of the second recording of the base script on theparticular system comprises determining the second dynamic value datathat describes the one or more second dynamic values received by theparticular system from the particular server during the second executionof the second recording of the base script on the particular system. 9.The system of claim 2, wherein comparing the first dynamic value dataand the second dynamic value data to identify candidate parameters forcorrelation within the base script comprises: generating a correlationlog using the first dynamic value data and the second dynamic valuedata.
 10. The system of claim 9, wherein generating the correlation logusing the first dynamic value data and the second dynamic value datacomprises: generating the correlation log that includes, for eachidentified candidate parameter, a respective dynamic value from thefirst dynamic values or the second dynamic values and a type of therespective dynamic value.
 11. The system of claim 9, wherein generatingthe correlation log using the first dynamic value data and the seconddynamic value data comprises: generating the correlation log thatincludes, for each identified candidate parameter, left boundary andright boundary delimiters which surround the correlation candidate in afirst response file generated during the first execution of the firstrecording of the base script on the particular system and a secondresponse file generated during the second execution of the secondrecording of the base script on the particular system.
 12. The system ofclaim 11, wherein generating the correlation log that includes, for eachidentified candidate parameter, left boundary and right boundarydelimiters which surround the correlation candidate in a first responsefile generated during the first execution of the first recording of thebase script on the particular system and a second response filegenerated during the second execution of the second recording of thebase script on the particular system comprises: generating thecorrelation log that includes, for each identified candidate parameter,left boundary and right boundary delimiters which surround thecorrelation candidate in the first response file generated during thefirst execution of the first recording of the base script on theparticular system using first response data received from a server andthe second response file generated during the second execution of thesecond recording of the base script on the particular system usingsecond response data received from the server.
 13. The system of claim2, the operations comprising: causing the particular system to executethe first recording of the base script to generate the first dynamicvalue data; causing the particular system to execute the secondrecording of the base script again to generate the second dynamic valuedata; and storing a dynamic value list that comprises the first dynamicvalue data and the second dynamic value data.
 14. The system of claim13, wherein the first recording is identical to the second recording andthe first recording and the second recording are for testing a businessflow on the particular system.
 15. The system of claim 2, the operationscomprising: causing the particular system to perform the first executionof the base script to generate the first dynamic value data; and causingthe particular system to perform the second execution of the base scriptto generate the second dynamic value data.
 16. The system of claim 2,wherein the base script comprises instructions that cause the particularsystem to simulate a virtual user interacting with the particularsystem.
 17. The system of claim 2, wherein comparing the first dynamicvalue data and the second dynamic value data to identify the candidateparameters for correlation within the base script comprises: determininga dynamic value list that identifies differences between the firstdynamic values and the second dynamic values.
 18. The system of claim 2,the operations comprising: causing the particular system to execute thecopy of the base script.
 19. The system of claim 18, the operationscomprising: generating performance test output for the particular systembased on the particular system's execution of the copy of the basescript.
 20. A method comprising: determining first dynamic value datathat describes one or more first dynamic values generated during a firstexecution of a first recording of a base script on a particular systemthat includes at least one processor and at least one memory and seconddynamic value data that describes one or more second dynamic valuesgenerated during a second execution of a second recording of the basescript on the particular system, the base script defining operations tobe executed in testing performance of the particular system; comparingthe first dynamic value data and the second dynamic value data toidentify candidate parameters for correlation within the base script;and inserting, for each of the identified candidate parameters and intoa copy of the base script at a location that corresponds to therespective identified candidate parameter, respective instructionsindicating that a dynamic value is to be saved during subsequentperformance testing of the particular system using the copy of the basescript.
 21. A non-transitory computer-readable medium storinginstructions, the instructions comprising: one or more instructionsthat, when executed by one or more first processors of a device, causethe one or more first processors to: determining first dynamic valuedata that describes one or more first dynamic values generated during afirst execution of a first recording of a base script on a particularsystem that includes at least one processor and at least one memory andsecond dynamic value data that describes one or more second dynamicvalues generated during a second execution of a second recording of thebase script on the particular system, the base script definingoperations to be executed in testing performance of the particularsystem; comparing the first dynamic value data and the second dynamicvalue data to identify candidate parameters for correlation within thebase script; and inserting, for each of the identified candidateparameters and into a copy of the base script at a location thatcorresponds to the respective identified candidate parameter, respectiveinstructions indicating that a dynamic value is to be saved duringsubsequent performance testing of the particular system using the copyof the base script.